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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 329 · 40 sums
TalentJR

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

NameDateTime takenScore ___ / 40
  1. 1.489 + ? = 928
  2. 2.A school has 673 children. 299 of them are girls. How many boys are there?
  3. 3.? + 292 = 465
  4. 4.213 − ? = 23
  5. 5.593 + 110 =
  6. 6.A train has 379 people in the front coaches and 390 people in the back coaches. How many people are on the train?
  7. 7.A train has 885 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  8. 8.892 + ? = 992
  9. 9.988 − 395 =
  10. 10.? − 125 = 169
  11. 11.868 − 449 =
  12. 12.205 − 103 =
  13. 13.A school has 220 children. 111 of them are girls. How many boys are there?
  14. 14.836 − 404 =
  15. 15.223 − 140 =
  16. 16.A school has 336 children. 256 of them are girls. How many boys are there?
  17. 17.210 − 105 =
  18. 18.491 + 247 =
  19. 19.A school has 694 children. 269 of them are girls. How many boys are there?
  20. 20.630 − 334 =
  21. 21.210 + 118 =
  22. 22.797 − ? = 398
  23. 23.291 − ? = 173
  24. 24.607 − 132 =
  25. 25.? − 113 = 582
  26. 26.510 − ? = 152
  27. 27.764 − 560 =
  28. 28.A train has 362 people in the front coaches and 560 people in the back coaches. How many people are on the train?
  29. 29.274 − ? = 34
  30. 30.A school has 320 children. 240 of them are girls. How many boys are there?
  31. 31.531 − 400 =
  32. 32.? − 357 = 591
  33. 33.521 − 480 =
  34. 34.916 − ? = 625
  35. 35.879 − 508 =
  36. 36.? + 492 = 704
  37. 37.577 − 137 =
  38. 38.A train has 814 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  39. 39.A school has 495 children. 469 of them are girls. How many boys are there?
  40. 40.A train has 323 people in the front coaches and 577 people in the back coaches. How many people are on the train?

Answer key

  1. 439
  2. 374
  3. 173
  4. 190
  5. 703
  6. 769
  7. 988
  8. 100
  9. 593
  10. 294
  11. 419
  12. 102
  13. 109
  14. 432
  15. 83
  16. 80
  17. 105
  18. 738
  19. 425
  20. 296
  21. 328
  22. 399
  23. 118
  24. 475
  25. 695
  26. 358
  27. 204
  28. 922
  29. 240
  30. 80
  31. 131
  32. 948
  33. 41
  34. 291
  35. 371
  36. 212
  37. 440
  38. 924
  39. 26
  40. 900

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